Miessen



1960 w. MIESSEN 2,923,998

ROTATABLE MOUNTING FOR NAPPING ROLLERS Filed March 15, 1954 I/71/em0n' if M 2/6 an) 1/ I 4* p M ROTATABLE MOUNTING FOR N APPING ROLLERS Walter Miessen, Viersen, Germany, assignor to Firma A. Monforts, M. Giadbach, Germany Application March 15, 1954, Serial No. 416,357

Claims priority, application Germany March 19, 1953 Claims. (Cl. 2633) The present invention relates to rotatable mountings for napping rollers used in a napping drum to raise the nap on textile materials.

Nap raising machines for dressing textile materials have a relatively large number of nap raising cylinders or rollers which are rotated against the textile material to raise the fibers and form the nap. These rollers must be sharpened from time to time by grinding. In order to do this, it is necessary to remove the cylinders from the machine and it has been customary to provide split bearing brasses half of which is fixed on the rim of a drum and the other half of the bearing being removable upon loosening of the attaching screws.

This old form of construction is open to a number of objections particularly in that dirt can enter the bearing brasses when the cylinders are removed and also that the brasses may be mixed so that upon re-assemblage the bearings are not properly fitted or it may be that a napping roller is not replaced in its proper brasses and therefore the bearings may be either too lose or too tight. Furthermore, the old construction is complicated, inconvenient for the operator, and time consuming.

An object of the present invention is to overcome these objections which is done by providing a novel construction wherein the napping rollers are mounted between stub shafts which are permanently mounted in ballbearings in the rim of the drum. The napping rollers may therefore be removed, ground and replaced between the stub shafts without disturbing the bearings so that the danger of dirt entering the bearings is eliminated. Other and further objects and advantages will appear in the art from the following description taken with the accompanying drawings in which like characters of reference denote similar elements in the several views and in which Figure 1 is a detailed, fragmentary, sectional view of a napping cylinder and its mounting. Figure 2 is a fragmentary, diagrammatical, side elevation of a napping drum incorporating the mounting of Figure 1.

The present invention enables the use of ball-bearings which remain in position and need not be taken out when the rollers are removed. Self-aligning ball-bearings have been found to be particularly suited for the purpose.

Referring now to the drawing in Figure 2 it will be seen that a plurality of napping rollers are supported in a rotatable drum provided with arms and 24 each carrying a bearing housing 25 at its extremity. This drum, supported on frame elements 21 and 22 of the nap raising machine, is rotated about its axis 23. Each of the napping rollers 3 is rotated about its own axis, alternate rollers being turned at different speeds to form what may be termed pile rollers and counter pile rollers.

The manner of mounting the napping rollers in the housings 25 at the extremity of arms 10 and 24 is shown in Figure 1 in which the napping roller per se is made up of a hollow cylindrical element 1 covered with a card clothing 2. At each end of the tubular element a plug 3 is mounted which has a co-axial threaded opening in its end. The end of plug 3 is provided with a gem erally flat conical surface 4 from which one or more teeth 5 project.

A self-aligning ball-bearing 9 is mounted in the usual manner in the housings 25 on the end of arm 10. A stub shaft 7 is mounted in ball-bearing 9. Stub shaft 7 is further provided with a co-axial opening and with a generally conical surface at the end facing inwardly of the arm 10, said conical surface being complementary to conical surface 4 and being provided with at least one tooth 8 projecting into spaces between the teeth 5. On the end of stub shaft 7 outwardly of the housing 25 may be mounted a pulley 11 by which the stub shaft may be positively rotated.

It will be noted that pulleys 11 are mounted on alternate roller stub shafts on one side of the drum and on the other alternate stub shafts at the other end of the drum. It will be seen therefore that the sub shaft at the end of the roller remote from the pulley 11 may be considerably shorter so as not to interfere with the driving means for the adjacent rollers.

A bolt 6 is provided which passes through the co-axial opening in stub shaft 7 and is threaded at 6' into the threaded co-axial opening in plug 3 to pull the conical surface of elements 3 and 7 into close engagement where by these elements are accurately aligned. To assure engagement between teeth 5 and 8 and for positive driving of the roller by the stub shaft, the end or head of bolt 6 is provided with a socket 6" of polygonal shape to receive a wrench and the outer periphery of the bolt head is threaded. A lock nut 12 is provided to threadedly engage the head of bolt 6 to prevent inadvertent loosening of the bolt.

It is to be understood that the invention as herein disclosed may be varied from the details described and shown without departure from the spirit of the subjoined claims.

I claim:

1. A mounting for a napping roller comprising a ball bearing, a stub shaft mounted in said ball bearing, a face on one end of said stub shaft extending substantially normally from said shaft, radial teeth on said face, a complementary toothed face on the end of the napping roller, and means to draw the two faces together.

2. The device of claim 1 in which the complementary toothed surfaces of the stub shaft and of the napping roller are provided with a slight conical configuration whereby the stub shaft and napping roller are drawn into alignment by the means for drawing the two elements together.

3. The device of claim 2 in which the means to draw the napping roller and stub shaft into alignment is a threaded element extending co-axially through the stub shaft and is provided with a lock nut to prevent loosenmg.

4. Installation for securing and mounting napping rollers in a napping machine, comprising a bearing body arranged in a napping roller support, a napping roller having a hub at the end thereof, two interfitting flat radial toothings, one of which is arranged at the end of said hub, the other at the end of said bearing body, and a bolt connecting said hub with said bearing body, the inner end of said bolt being screwed into said hub to pull said hub against said bearing body.

5. Installation according to claim 4, characterized in that the bearing body at the driving end of the napping roller is only rotatable in the napping roller support.

References Cited in the file of this patent UNITED STATES PATENTS 

